const result1 = 1 + 3;
console.log(result1) //4

const result2 = 20 + '1';
console.log(result2) //201

const result3 = true + "1"
console.log(result3) //true1

console.log(10 == '10'); //true
console.log(0 == ""); //ture
console.log(0 == false); //true
console.log('' == false); //true
console.log(null == undefined); //true

const obj = { a : 10 }
console.log(obj.b)
console.log(obj.b == null)

console.log(10 && 0)
